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Finding the Fourth Proportional to 326.72, 489.47 and 196.58

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Solution

The fourth proportional to 326.72, 489.47 and 196.58 is: 294.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    326.72 : 489.47 = 196.58 : x
  2. Step 2: Convert to fraction form
    326.72/489.47 = 196.58/x
  3. Step 3: Cross multiply
    326.72x = 489.47 × 196.58
  4. Step 4: Simplify right side
    326.72x = 96,216.58
  5. Step 5: Solve for x
    x = 96,216.58/326.72
  6. Step 6: Final answer
    x = 294.50

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.